Door panel



FIG. 1 is a perspective view of the door panel showing our new design;

FIG. 2 is an elevational view thereof; and,

FIG. 3 is a top elevational view thereof.

The broken line showings of the rectangular area on the armrest and the control button in the door handle area and the interior of the door are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a door panel, as shown and described. 